

//
//  FireworksView.m
//  CAEmitter粒子
//
//  Created by student on 16/3/19.
//  Copyright © 2016年 niit. All rights reserved.
//

#import "FireworksView.h"

@implementation FireworksView
-(void)lanunchFireWork
{
    CAEmitterLayer *mortor = [CAEmitterLayer layer];
    //发射位置
    mortor.emitterPosition = CGPointMake(self.bounds.size.width/2, self.bounds.size.height*(0.75));
    //发射模式
    mortor.renderMode = kCAEmitterLayerAdditive;
    
    
    //Invisible particle representing the rocket before the explosion
    CAEmitterCell *rocket = [CAEmitterCell emitterCell];
    rocket.emissionLongitude = -M_PI/2;//发射的z轴
    rocket.emissionLatitude = 0;
    rocket.lifetime = 1.6;
    rocket.birthRate = 1;
    rocket.velocity = 400;
    rocket.velocityRange = 100;
    rocket.yAcceleration = 250;
    rocket.emissionRange = M_PI /4;
    rocket.color = CGColorCreateCopy([UIColor colorWithRed:5 green:5 blue:5 alpha:.5].CGColor);
    rocket.redRange = 0.5;
    rocket.greenRange = 0.5;
    rocket.blueRange = 0.75;
    [rocket setName:@"rocket"];
    
    CAEmitterCell *flare = [CAEmitterCell emitterCell];
    flare.contents = (id)[UIImage imageNamed:@"tspark.png"].CGImage;
    flare.emissionLongitude = (4 * M_PI) / 2;
    flare.scale = 0.4;
    flare.velocity = 100;
    flare.birthRate = 45;
    flare.lifetime = 1.5;
    flare.yAcceleration = 350;
    flare.emissionRange = M_PI / 7;
    flare.alphaSpeed = -0.7;
    flare.scaleSpeed = -0.1;
    flare.scaleRange = 0.1;
    flare.beginTime = 0.01;
    flare.duration = 0.7;
    
    //The particles that make up the explosion
    CAEmitterCell *firework = [CAEmitterCell emitterCell];
    firework.contents = (id)[UIImage imageNamed:@"tspark.png"].CGImage;
    firework.birthRate = 9999;
    firework.scale = 0.6;
    firework.velocity = 130;
    firework.lifetime = 2;
    firework.alphaSpeed = -0.2;
    firework.yAcceleration = 80;
    firework.beginTime = 1.5;
    firework.duration = 0.1;
    firework.emissionRange = 2 * M_PI;
    firework.scaleSpeed = -0.1;
    firework.spin = 2;
    
    //Name the cell so that it can be animated later using keypath
    [firework setName:@"firework"];
    
    //preSpark is an invisible particle used to later emit the spark
    CAEmitterCell *preSpark = [CAEmitterCell emitterCell];
    preSpark.birthRate = 80;
    preSpark.velocity = firework.velocity * 0.70;
    preSpark.lifetime = 1.7;
    preSpark.yAcceleration = firework.yAcceleration * 0.85;
    preSpark.beginTime = firework.beginTime - 0.2;
    preSpark.emissionRange = firework.emissionRange;
    preSpark.greenSpeed = 100;
    preSpark.blueSpeed = 100;
    preSpark.redSpeed = 100;
    
    //Name the cell so that it can be animated later using keypath
    [preSpark setName:@"preSpark"];
    
    //The 'sparkle' at the end of a firework
    CAEmitterCell *spark = [CAEmitterCell emitterCell];
    spark.contents = (id)[UIImage imageNamed:@"tspark.png"].CGImage;
    spark.lifetime = 0.05;
    spark.yAcceleration = 250;
    spark.beginTime = 0.8;
    spark.scale = 0.4;
    spark.birthRate = 10;
    
    preSpark.emitterCells = [NSArray arrayWithObjects:spark, nil];
    rocket.emitterCells = [NSArray arrayWithObjects:flare, firework, preSpark, nil];
    mortor.emitterCells = [NSArray arrayWithObjects:rocket, nil];
    [self.layer addSublayer:mortor];

    
    //
}

@end
